In the space provided write an electron configuration for a silicon atom in the excited state

What happens when liquid water is heated? then you got yo answer

iron and sleel

make siroeel

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.